package com.ding.coolweather2.activity;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.ding.coolweather2.R;
import com.ding.coolweather2.db.CoolWeatherDB;
import com.ding.coolweather2.db.CoolWeatherOpenHelper;
import com.ding.coolweather2.model.City;
import com.ding.coolweather2.model.County;
import com.ding.coolweather2.model.Province;
import com.ding.coolweather2.util.HttpCallbackListener;
import com.ding.coolweather2.util.HttpUtil;
import com.ding.coolweather2.util.Utility;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by dingsheng on 2016/6/6.
 */
public class ChooseAreaActivity extends Activity{
    public static final int LEVEL_PROVINCE=0;
    public static final int LEVEL_CITY=1;
    public static final int LEVEL_COUNTY=2;

    private ProgressDialog progressDialog;
    private TextView titleText;
    private ListView listView;
    private ArrayAdapter<String>adapter;
    private CoolWeatherDB coolWeatherDB;
    private List<String>dataList= new ArrayList<>();

    //省列表
    private List<Province> provinceList;
    //市列表
    private List<City> cityList;
    //县列表
    private List<County> countyList;
    //选中的省份
    private Province selectedProvince;
    //选中的城市
    private City selectedCity;
    //当前选择的级别
    private int currentLevel;
    //是否从WeatherActivity中跳转过来
    private boolean isFromWeatherActivity;

  //  private CoolWeatherOpenHelper dbHelper;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        isFromWeatherActivity=getIntent().getBooleanExtra("from_weather_activity",false);
        SharedPreferences prefs= PreferenceManager.getDefaultSharedPreferences(this);
        //已经选择了城市且不是从WeatherActivity跳转过来，才会直接跳转到WeatherActivity
        if (prefs.getBoolean("city_selected",false)&& !isFromWeatherActivity){
            Intent intent=new Intent(this,WeatherActivity.class);
            startActivity(intent);
            finish();
            return;
        }
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.choose_area);
       // dbHelper=new CoolWeatherOpenHelper(this,"cool_weather.db",null,2);
        listView= (ListView) findViewById(R.id.list_view);
        titleText= (TextView) findViewById(R.id.title_text);
        adapter= new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, dataList);
        listView.setAdapter(adapter);
        coolWeatherDB=CoolWeatherDB.getInstance(this);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View view, int index, long arg3) {
                if (currentLevel==LEVEL_PROVINCE){
                    selectedProvince=provinceList.get(index);
                    queryCities();
                }else if (currentLevel==LEVEL_CITY){
                    selectedCity=cityList.get(index);
                    queryCounties();
                }else if (currentLevel==LEVEL_COUNTY){
                    String countyCode=countyList.get(index).getCountyCode();
                    Intent intent=new Intent(ChooseAreaActivity.this,WeatherActivity.class);
                    intent.putExtra("county_code",countyCode);
                    startActivity(intent);
                    finish();
                }
            }
        });
        queryProvinces();//加载省级数据
    }
    /**
     * 查询全国所有的省，优先从数据库查询，如果没有查询到再去服务器上查询
     * */
    private void queryProvinces(){
        provinceList=coolWeatherDB.loadProvinces();
        if (provinceList.size()>0){
            dataList.clear();
            for (Province province : provinceList){
                dataList.add(province.getProvinceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            titleText.setText("中国");
            currentLevel=LEVEL_PROVINCE;
        }else{
            queryFromServer(null,"province");
        }
    }
    /**
     * 查询选中省内所有的市，优先从数据库查询，如果没有查询到再去服务器上查询
     * */
    private void queryCities(){
        cityList=coolWeatherDB.loadCities(selectedProvince.getId());
        if (cityList.size()>0){
            dataList.clear();
            for (City city : cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            titleText.setText(selectedProvince.getProvinceName());
            currentLevel=LEVEL_CITY;
        }else{
            queryFromServer(selectedProvince.getProvinceCode(),"city");
        }
    }
    /**
     * 查询选中市内所有的县，优先从数据库查询，如果没有查询到再去服务器上查询
     * */
    private  void queryCounties(){
        countyList=coolWeatherDB.loadCounties(selectedCity.getId());
        if (countyList.size()>0){
            dataList.clear();
            for (County county : countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            titleText.setText(selectedCity.getCityName());
            currentLevel=LEVEL_COUNTY;
        }else{
            queryFromServer(selectedCity.getCityCode(),"county");
        }
    }
    /**
     * 根据传入的带好和类型从服务器上查询省市县数据
     * */
    private void queryFromServer(final String code,final String type){
        String address;
        if (!TextUtils.isEmpty(code)){
            address="http://www.weather.com.cn/data/list3/city"+code+".xml";
        }else{
            address="http://www.weather.com.cn/data/list3/city.xml";
        }
        showProgressDialog();
        HttpUtil.sendHttpRequest(address, new HttpCallbackListener() {
            @Override
            public void onFinish(String response) {
                boolean result = false;
                if ("province".equals(type)) {
                    result = Utility.handleProvincesResponse(coolWeatherDB, response);
                } else if ("city".equals(type)) {
                    result = Utility.handleCitiesCitiesResponse(coolWeatherDB,
                            response, selectedProvince.getId());
                } else if ("county".equals(type)) {
                    result = Utility.handleCountiesResponse(coolWeatherDB,
                            response, selectedCity.getId());
                }
                if (result) {
                    //通过runOnUiThread()方法回到主线程处理逻辑
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if ("province".equals(type)) {
                                queryProvinces();
                            } else if ("city".equals(type)) {
                                queryCities();
                            } else if ("county".equals(type)) {
                                queryCounties();
                            }
                        }
                    });
                }
            }

          @Override
            public void onError(Exception e) {
                //通过runOnUiThread()方法回到主线程处理逻辑
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(ChooseAreaActivity.this, "加载失败", Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
    }
    /**
     * 显示对话框
     * */
    private void showProgressDialog(){
        if (progressDialog==null){
            progressDialog=new ProgressDialog(this);
            progressDialog.setMessage("正在加载...");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();
    }
    /**
     * 关闭进度对话框
     * */
    private void closeProgressDialog(){
        if (progressDialog!=null){
            progressDialog.dismiss();
        }
    }
    /**
     * 捕获Back键，根据当前的级别来判断，此时应该返回市列表、省列表、还是直接退出
     * */
    @Override
    public void onBackPressed(){
        if (currentLevel==LEVEL_COUNTY){
            queryCities();
        }else if (currentLevel==LEVEL_CITY){
            queryProvinces();
        }else{
            if (isFromWeatherActivity){
                Intent intent=new Intent(this,WeatherActivity.class);
                startActivity(intent);
            }
            finish();
        }
    }
}
